LS430 − NEW FEATURES 18 2. Major Difference The following changes have been made from the A650E automatic transmission used on the 2003 LS430. The following changes have been made from the A750F automatic transmission used on the 2003 LX470. Component Function Fluid Type Fluid type has been changed from the ATF Type T-IV to the ATF WS. Oil Pump The material of the pump cover has been changed to reduce weight from steel to aluminum. Oil Strainer The strainer has been changed from the metal mesh type (metal case) to the felt type (plastic case). ATF Filling Procedures ATF filling procedures has been changed. Planetary Gear Unit The O/D planetary gear has been discontinued.
The front planetary carrier made of aluminum has been adopted. Bearings in the center and rear planetary gear units have been changed from the needle roller bearing to the cage and roller bearing. A centrifugal fluid pressure canceling mechanism has been adopted in the C , C , C , and C clutches. 1 2 3 4 Valve Body Unit Solenoid valve SLN has been discontinued and three solenoid valves (SL1, SL2, SR) have been added. Solenoid valve has been made compact and lightweight. Electronic Control System The following controls have been changed or adopted. Shift timing control has been changed. Clutch pressure control has been changed. Lock-up clutch control has been changed.
Flex lock-up clutch control has been changed. Orifice switching control has been adopted. Multi-mode Automatic Transmission has been adopted. Component Function Fluid Type Fluid type has been changed from the ATF Type T-IV to the ATF WS. Oil Strainer Type of the strainer has been changed from the metal mesh type to the felt type. ATF Filling Procedures ATF filling procedures has been changed. Planetary Gear Unit The 6-speed configuration has been achieved without increasing the number of planetary gears. C clutch and F one-way clutch have been added. 4 4 High μ (coefficient) friction material has been adopted on the B brake.
4 Bearings in the center and rear planetary gear units have been changed from the needle roller bearing to the cage and roller bearing. Valve Body Unit Two solenoid valves (S3, S4) have been added. Solenoid valve S2 has been changed from 2-way to 3-way. Solenoid valve has been made compact and lightweight. Electronic Control System The following controls have been changed or adopted. Shift timing control has been changed. Lock-up clutch control has been changed. Flex lock-up clutch control has been changed. Orifice switching control has been adopted. Multi-mode Automatic Transmission has been adopted.